Lacquering heating system.



J. L. ISAACS. LACQUERING HEATING SYSTEM. APPLIQATION FILED Nov. 6, 1909.

1,000,412, A Patented Aug. 15,1911

2 SHEETS-SHEBT 1.

r9 f7 dwg Y J. L. IsAAcs. LAGQUERNG HEATING SYSTEM. vAPPLICATION FILED NOV. 6,1909` 1,000,412- 'Patented Aug. 15, 1911,

2 SHEETS-SHEET 2.

AHA/HAHAAHH JOEL L. ISAACS, F BED BANK, NEW JERSEY.

LacouEnrNe HEATING sYsrEm.

specmcaaon of Letters Patent. Patented Aug. 15,` 1911.

Application Bled November 6, 1909. Serial No. 526,487.

` To all whom it may concern.'

Be it known that I, Joni. L. Isaacs, residing at Red Bank, in thelcounty of Monmouth land State of New Jerse have invented certain new and usefu Improvelments in Lacquering Heating'Systems, of whlch the following is a complete, clear,

full, and precise specification.

My invention relates to lacquering heatp ing systems particularly to systems in which metallic pieces such as tubes, sleeves or the like fort bedsteads are to be continuously heated while coats of lacquer are Iapplied thereto.

In applying lacquer to Imetallic parts, in order that lacquer may be uninterruptedly applied coat after coat, it is necessary that the parts be kept at a temperature which will dry one coat as fast as 1t is applied so that succeeding coats can be applied without interruption and loss of time. rlhe parts to be lacquered' must also be heated uniformly and the heating means must be suchl that the heat will confined to the system and will not radiate to make it un- I comfortable for the operators.

The main object of my invention is to rovidemechanism which will cause circuation of ,heating medium such as hot a1r through a fixed path into which path apart to be lacquered can. be included so that the hot air will flow through the object to.un1- formly heat it during the lacquer application process.

adapt the mechanism so thatv parts to be la uered can be quickly inserted 1n the pat and turned while in the path to facilitate the application oflacquer to all parts thereof.

Another object is to provide means either manually or automatically operative to prevent the escape of hot air from the path .during the interval when a finished object is taken from the system andan unfinished obiect applied thereto. v

Another object is to provide means whereby the flow through the path will be auto matically stopped upon removal of an `object from the system, and will be automatil cally re-started when another object is inserted.

Another object is to provide means for conlinin the heat to the system andto prevent radiation of heat into space. e

All the various features of my invention Another object of my invention is to.

specification and shown in the accompanyp ing drawings in which drawings- Figure 1 is an elevation view showing more or less diagrammatically object supporting means and the heat circulating system connected therewith, and Fig. 2 is a similar view showing somewhat modified arrangement.

The object supporting means comprises a table 1 on whose top are mounted a stationary head stock 2 and a slidable head stock 3, the slidable head stock pivoting a pinion 4 which engages in a rack'5 extending longitudinally along the top of the table, a hand wheel 6 being connected with the pinion so that the pinion may be turned and the tail stock moved longitudinally along the table top. The head stock 2 pivots the front end of a hollow spindle 7 whose rear. end-pivots on a bearing standard 8, the rear end of the standard having rotatable connection in a stationary connecting frame y9. Between the head'stock 2 and the standard 8 a hand wheel 10 is secured to the hollow spindleY so that the spindle can be turned by hand. In the tail stock 3 is journaled a hollow sleeve 11 whose front end 12 is relatively rotatable. Between the inner ends of spindle 7 and part 12 an object o `such as the tubular part an electrical motor M. The outer end ofA sleeve 11 connects with a flexible pipe 417 whose other end communicates with the inlet of the fan 16. The heating drum comprises the end sections 18 and 19 with which pipes 13 and 15 respectively communicate, the inner walls ofthe sections being connected by a plurality of pipes 20, so that air blown through the heater is spread to give a large heat receiving surface. Inclosingl the heater is a frame 21 connected at one end with piping 22 which receives heating medium such as steam from some suitable source, Awhile the other end of the inclosing fra-me connects' with .exhaust piping 23. When the fan is in operation the air is kept in circulation through the path including ythe piping referred to and the object 0 and this air is heated by the steam flowing about the heater 14. The temperature of the air flow can be adjusted so that the object will be\ heated sufficiently to cause quick drying of lacquer applied thereto so that successive coats. can be applied Without interruption. The flexible piping 17 enables the tail stock to be moved so tha-t objects of different length can be inserted in the heating path. The heating mechanism for heating the air can be of any suitable design. For example, as shown in Fig. 2 this mechanism could be in the form of a winding 24 encircling the piping at some point and receiving current from a generator G, the Winding section being inclosed in a frame 25 so that the heat from the Winding is concentrated on the piping.

It is desirable that escape of air from the path be prevented when an object is re- -moved from the system, as when a finished object is being replaced by an uninished object. Referring to Fig. 1, I have shown means whereby the object section of the path can be shunted during the time that the 0bject is removed. The shunt path com rises a pipe 26 and a iiexi'ble pipe section 2 the pipe section 26 connecting with the piping 13 near the left end standard l8 and the flexible piping connecting with the right end of sleeve 11, a valve 28 being interposed between piping 26 and piping 13 and a valve 29 being interposed between piping 27 and sleeve 11. The valves are of the same construction each having a rotatable valve block 30 provided with a T port 31, each valve block being connected with' an. actuating wheel 31. Vhenan Objectis inserted between the head and tail stocks the valve blocks are turned to connect piping 13 with spindle 7 and piping 17 with sleeve 11, and to shut oft' passageway to the shunt path through pipmg 26 and 27. Before the object is removed the valve blocks are turned to disconnect piping 13 and 17 from the spindle 7 and sleeve 11, and to connect this piping with the shunt piping 26 and 27 so thatfiow of air will be shunted from the object through the shunt ath, this vprevent-ing any escape of air rom the circul lating system. Instead of having a shunt path the operator could simply unclutch the fan from the motor or stop the motor before taking out the piping, and in Fig'. 2 I have shown a switch 32 which controls the circuit from the generator G to the motor which enables the operator to stop the motor and fan at any time. In order, to save time this disconnection of the motor can be accomplished automatically by the removal of the object, and re-starting of the motor ac'- complished automatically by the re-ins'ertion 'l ofthe object. When an object is in position current will iiow from the generator'through conductor a, the closed switch 32, conductor b, through the motor, through conductor 0 vto the head stock 2, thence through the object to the part 12 and sleeve 11 to the tail stock and from thence through conductor d back to the generator, the switch 32 and the object being included serially in this circuit. The operator can stop the motor and fan at any time by opening switch 32, or switch 32 can remain closed andthe circuit opened whenever an object is removed from the system. Upon re-insertion of an object the circuit will be automatically closed and the motor andfan will again operate. It is understood of course that all the parts included in the circuit are properly insulated from other parts in order to prevent short circuits. It may also be desirable to cut out the heating system whenever there is no object in position. readily accomplished by the operation of suitable valve mechanism for controlling the steam fiow. In Fig. 2 I have shown another switch 33 for controlling the circuit through the heating coil 24. When the switch is In Fig. 1 this can be' closed current floWS from the generator through conductor a,`switch 33, conductor e,

conductor f, whereby the heating coil can'be cut from the circuit by opening switch 33. By thus being adapted to prevent the-escape of heat or the circulation of heat and air when' there is no object in place, theA heat will be confined to the system and will not radiate into space to make it uncomfortable for the operators and to unduly heat the room in which the system is situated. As an additional guard against radiation of heat the piping can be covered with some non-conducting material 34 such as asbestos.

I do not wish to be eoninedto the precise arrangements and controls I have shown, as many other arrangements a're possible for carrying out the main purpose .of my invention, namely, to -establish a confined circuit through which heated air can be passed, in which circuit objects to be heated can be inserted and in which system escape of hot air into space can be readily prevented when there is no object in position.

I therefore desirey to secure the following claims by Letters Patent.

1. In a lacquering heating system, the

combination of a piping forming a closed path, means for causing air flow through said path, means for applying heat to said path to heat the air flowing therethrough, two parallel branches connected with said path, terminals for one of said branches for receiving a hollow -object to be lacquered, and means 'for closing the .path through either one of said branches.

-Y 2. In a lacquering Heating system, the combination of terminals for receiving a tubular object to be heated and lacquered,

main piping connecting said terminals, aA

blower connecting with said main piping for causingair -ilow therethrough, a heater associated with said mai-n piping to heat the air flowing therethrough, a shunt piping path about said terminals, and means for' defiecting the flow through said shunt piping upon removal of said object from said terminals.

3. In a lacquering heating system, the combination of tubular terminals for receiving between them a hollow object to be lacquered, main piping bridging said terminals, a fan included in said main piping for causing air flow therethrough, heating means associated with said main piping for heating the air flowing therethrough, substitute connection between 'said terminals, and valve mechanism for connecting either said terminals or said substitute connection with said main piping whereby the heated air may How entirely through said object to be lacquered or through said substitute connection upon removal of the object from said terminals. v

4. In a lacquering heating system, the combination of rotatable tubular terminals adapted for receiving between them a hol` object to be lacquered, main piping low bridging said terminals, a fan for causing air iow through said piping, heating' means for 'heating the air iow through said piping, a substitute path bridging said ter` minals, and valve mechanism for closing the path through the main piping either through said terminals andthe object between said terminals or through said sub stitute connection, said rotatable terminals enabling turning of the lobject during the application of lacquer thereto.

5. In a lacquering heating system, the combination of terminals, piping bridging said terminals, means for causing air iow through said piping, means for heating the air flowing through said piping, said terminals being adapted to receive between them objects to be lacquered, an object when inserted between said terminals forming a closed path with said piping through which the heated air can repeatedly circulate, and means forrmaintaining said closed path upon removal of the object from the terminals.

6. In a lacquering heating system, the combination of piping forming a closed path, means for circulating air through said path, means for heating the circulated air, and hollow clamping jaws connecting with said path, said hollow jaws serving to support between them a hollow object to be lacquered to bridge said object about part of said path to receive the heated air flow.

JOEL L. ISAACS.

Witnesses: i

A. J. MARRATT, J. FRANK RESEBIE. 

